package servlet.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import servlet.bean.UserBean;

public class LoginFilter implements Filter{

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		// 验证用户
		HttpServletRequest servReq = (HttpServletRequest) request;
		UserBean loginedUserB=(UserBean) servReq.getSession().getAttribute("loginedUserB");
		
		if(loginedUserB!=null && loginedUserB.getUsername()!=null && !loginedUserB.getUsername().toString().equals("")){
			//验证合法
			chain.doFilter(request, response);
		}else{
			//登录失败
			((HttpServletResponse)response).sendRedirect("./../login.jsp");
		}
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}
